This Grade 100 US Type Master Link (MLK Type) is engineered for premium overhead lifting, serving as a reliable primary connection point for 1-leg and 2-leg chain slings, wire rope slings, and synthetic sling assemblies.

High-Strength Grade 100 Alloy Steel: Drop-forged, quenched, and tempered to provide approximately 25% higher working load limits than conventional Grade 80 master links.
US Type Dimensional Standards: Engineered to meet standard US rigging dimensions, ensuring smooth engagement with large crane hooks and industrial lifting hardware.
4:1 Design Factor: 100% proof load tested and fully certified for overhead lifting safety in accordance with ASME B30.26 and EN 1677 standards.
Versatile Rigging Application: Ideal top connector for single-leg and double-leg chain, synthetic webbing, and steel wire rope sling configurations.
High-Visibility Powder Coating: Coated with a durable, vibrant protective finish to resist abrasion, rust, and harsh environmental exposure while aiding job-site safety.

Technical Data

Grade 100 US Type Master Link - MLK Type

Heavy-Duty Oblong Alloy Steel Ring for 1-Leg and 2-Leg Sling Bridles

Grade 100 Alloy Steel US Type Dimension 4:1 Design Factor ASME B30.26

In heavy industrial hoisting, crane rigging, shipyard material transfers, and structural construction, single-leg and double-leg chain or wire rope slings require a certified top terminal attachment point to connect directly with the crane hoist hook. An unrated or improperly sized master link introduces severe stress concentrations, localized deformation, and catastrophic failure hazards.

The H-Lift Grade 100 US Type Master Link (MLK Type) provides an engineered, code-compliant rigging solution: a heavy-duty oblong alloy steel ring designed to seat securely in crane hook saddles while distributing tensile forces smoothly across 1-leg and 2-leg sling bridles.

Key Features & Standards

Material: Forged or welded quenched & tempered alloy steel.
Grade 100 Strength: Delivers a 25% increase in Working Load Limit (WLL) over standard Grade 80 hardware for the equivalent wire diameter, enabling rigging crews to reduce rigging deadweight while maintaining superior strength margins.
Design Factor: 4:1 (standard for rigging hardware under ASME B30.26 / ASTM A952).
Proof Load: 100% proof tested at 2.5 times the Working Load Limit.
Durability: Quenched and tempered in automated thermal tracks, MLK master links deliver high fatigue toughness, impact shock resistance, and long-term durability in extreme operating environments.
Applicable Standards: Compliant with ASME B30.26, ASME B30.9, OSHA 1910.184, and ASTM A952/A952M.
Traceability & Markings: Includes trace code/batch number, Grade (100 or G10), size, and manufacturer identifier.

Frequently Asked Questions

Q: What is the primary difference between a US Type MLK Master Link and a European Standard Master Link?

A: The primary distinction lies in dimensional sizing standards and dimensional proportions. The US Type MLK Master Link is dimensionally proportioned according to US rigging conventions (ASTM A952 and ASME B30.26), featuring a standardized 2:1 length-to-width oblong profile that provides generous internal clearance for standard US crane hooks, wire rope thimbles, and mechanical chain connecting links.

Q: Can a single MLK Master Link be used for both 1-leg and 2-leg sling assemblies?

A: Yes. An MLK master link can support either a single-leg or a 2-leg sling bridle. However, when used in a 2-leg bridle configuration, riggers must account for the bridle sling angle (e.g., 60°, 45°) and ensure the combined leg tension does not exceed the rated Working Load Limit (WLL) of the specific MLK model.

Technical Specifications

Item No.	Chain Size (inch)	WLL (ton)			Main Dimensions (mm)			Weight (kg)	Product Code
Item No.	Chain Size (inch)	1 Leg	2 Legs (0-45°)	Rope	A	B	D	Weight (kg)	Product Code
10-MLK-13A	7/32 (6mm)	1.22	2.2	2.8	127	63.5	13	0.36	505026013
10-MLK-13A	1/4 (7mm)	2.0	-	2.8	127	63.5	13	0.36	505026013
10-MLK-13	1/4 (7mm)	2.0	3.4	3.4	127	70	16	0.6	505026016
10-MLK-13	5/16	2.6	-	3.4	127	70	16	0.6	505026016
10-MLK-16	5/16	2.6	-	4.0	152	76	16	0.7	505026116
10-MLK-19	5/16	2.6	4.5	5.6	152	80	18	0.9	505026019
10-MLK-19	3/8	4.0	-	5.6	152	80	18	0.9	505026019
10-MLK-22	3/8	4.0	6.9	6.9	160	95	22	1.5	505026022
10-MLK-22	1/2	6.8	-	6.9	160	95	22	1.5	505026022
10-MLK-25	1/2	6.8	11.8	11.8	190	110	27	2.8	505026025
10-MLK-25	5/8	10.3	-	11.8	190	110	27	2.8	505026025
10-MLK-32	5/8	10.3	17.7	17.7	240	140	33	5.4	505026032
10-MLK-32	3/4	16.0	-	17.7	240	140	33	5.4	505026032
10-MLK-38	3/4	16.0	27.7	27.7	267	150	40	8.2	505026038
10-MLK-38	7/8	19.4	-	27.7	267	150	40	8.2	505026038
10-MLK-45	7/8	19.4	33.6	38.5	305	152	45	11.4	505026045
10-MLK-45	1	27.1	-	38.5	305	152	45	11.4	505026045
10-MLK-51	1	27.1	46.9	46.5	355	178	51	16.8	505026051
10-MLK-51	1-1/4	41.0	-	46.5	355	178	51	16.8	505026051
10-MLK-57	1-1/4	41.0	64.9	64.9	406	203	57	24.5	505026057
10-MLK-64	1-1/4	41.0	71.0	72.6	406	203	64	31.1	505026064

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